Even though we learn a great deal in school, some of the most essential skills we need as adults aren’t universally, formally taught. Here are some of the subjects and skills we wish we’d learned in school early on (and which you can still learn now. It’s never too late!).

10. Computer Science

With all the emphasis on learning to code these days, it’s hard to believe most schools aren’t teaching computer science. According to Code.org, though, 9 out of 10 schools aren’t teaching coding classes—even though engineering and programming are among the fastest growing and most profitable professions today. Even if you don’t plan to become or raise a future programmer, learning to think like a computer scientist is a fundamental skill everyone could benefit from, similar to learning physics or English composition.

8. Time Management Techniques

Time management courses are usually reserved for CEOs and upper management employees, but if there’s one thing a busy student or worker (of any age) needs to learn, it’s how to make the most of their limited time. Time management techniques might be taught here and there in unrelated courses for students from elementary school to college, but perhaps our procrastination and productivity issues would be lessened if we were taught GTD or other productivity techniques in high school or earlier.

7. Study Skills (or Learning How to Learn)

The ultimate life hack is “learning how to learn.” As with time management, the best teachers incorporate study skills into their classes, but it’s not formally taught in all schools. Learning to take better notes, using more efficient ways of studying (highlighting doesn’t work as well as taking practice tests) and, perhaps most important, remembering what you study are all fundamental skills every student should develop.

3. Basic Self-Defense

One semester in high school, I was taught square dancing for gym class. I think basic self-defense moves would’ve served me better today. (To be fair, the school also taught Judo, but only for the boys. We girls got to do “modern dance.”)

2. Mental Health

Gym classes are meant to reinforce the importance of physical health, and school overall is there to strengthen our minds, but unless you’re taking a psychology class, chances are mental health doesn’t get explored much. All of us have to deal with mental health issues from time to time, whether it’s how to handle stress or anxiety…or more difficult subjects like depression or addiction (personally or with someone you know). When mental health topics rise in the news or something tragic befalls part of the student body, we talk about it more, but we’d all benefit if the discussions happened earlier.

Lifehacker’s Weekend Roundup gathers our best guides, explainers, and other posts on a certain subject so you can tackle big projects with ease. For more, check out our Weekend Roundup and Top 10 tags.